cost accountant vs accountant

cost accountant and accountant both are nouns.

Word	Noun	Adjective	Verb	Adverb
cost accountant	Yes	No	No	No
accountant	Yes	No	No	No

As nouns, accountant is a hypernym of cost accountant; that is, accountant is a word with a broader meaning than cost accountant:

cost accountant: a specialist in the systematic recording and analysis of the costs incident to production
accountant: someone who maintains and audits business accounts

Other hypernyms of cost accountant include comptroller, controller.

cost accountant (noun)	accountant (noun)
a specialist in the systematic recording and analysis of the costs incident to production	someone who maintains and audits business accounts